Results 91 to 100 of about 6,176 (169)

Tandem Reactions of 1,2,4-Oxadiazoles with Allylamines

, 2011
A reaction of 3-chloro-1,2,4-oxadiazoles with allylamine and diallylamine has been investigated. 3,3a,4,5-Tetrahydroisoxazolo[3,4-d]pyrimidines are produced through a tandem ANRORC/[3þ2]cycloaddition pathway consisting of the addition of allylamine to ...
PALUMBO PICCIONELLO, Antonio, Antonio Palumbo Piccionello, Silvestre Buscemi, Andrea Pace, BUSCEMI, Silvestre, PACE, Andrea   +5 more
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Rapid and Efficient Synthesis of 1,2,4-Oxadiazoles Utilizing Polymer-Supported Reagents under Microwave Heating

, 2016
1,2,4-Oxadiazoles can be rapidly and efficiently synthesized from a variety of readily available carboxylic acids and amidoximes using either method A or method B.
Stevan W. Djuric (2466865), Daryl R. Sauer (2454805), Reagan L. Miller (2394373), Ying Wang (11406)   +3 more
core   +1 more source

Symmetrical and non-symmetrical 2,5-diaryl-1,3,4-oxadiazoles: synthesis and photophysical properties.

, 2015
International audienceWe report herein the synthesis of 2,5-diaryl-1,3,4-oxadiazoles containing both electron-donating and withdrawing substituents as well as bis- and tris-2,5-disubstituted-1,3,4-oxadiazoles containing electron-donating substituents ...
Gautier, Arnaud, Paraschivescu, Codruţa C., Hădade, Niculina D., Matache, Mihaela, Coman, Anca G., Cisnetti, Federico   +5 more
core   +1 more source

Optical and Electrical Properties of Substituted 2,5-Diphenyl-1,3,4-Oxadiazoles

, 2000
New substituted 2,5-diphenyl-1,3,4-oxadiazoles are reported as luminescent materials in light emitting diodes LEDs . The investigated new oxadiazoles show efficient blue and green emission in single layer devices. The combination with a hole transporting
Brehmer, Ludwig, Kaminorz, Yvette, Schulz, Burkhard (PD Dr.)   +2 more
core  

Ring transformations of heterocycles. Part 1. Transformation of 4‐amino‐Δ2‐1,2,4‐oxadiazolines into 1,3,4‐oxadiazoles

, 1991
3‐Aryl‐4‐amino‐δ2‐1,2,4‐oxadiazolines 3 and their N‐chloroacetyl derivatives 4, upon treatment with chloroacetic anhydride in refluxing toluene, afford 2‐chloromethyl‐5‐aryl‐1,3,4‐oxadiazoles 5, suggesting the conversion sequence 3 → 4 → 5.
Woydt, M, El‐abadelah, MM, Rademacher, Paul, Awadallah, Adel M., Nazer, MZ, Hussein, AQ   +5 more
core   +1 more source

One-Step Construction of 1,3,4-Oxadiazoles with Anticancer Activity from Tertiary Amines via a Sequential Copper(I)-Catalyzed Oxidative Ugi/aza-Wittig Reaction

Molecules
An unparalleled copper(I)-catalyzed synthesis of 1,3,4-oxadiazoles from tertiary amines in one step has been described. The one-pot reactions involving (N-isocyanimine)triphenylphosphorane, tertiary amines, and carboxylic acids resulted in the formation ...
Mei Sun, Nong-Qi Mao, Sheng-Long Wang, Xin-Ming Han, Gang Yao, Ping Xue, Chong-Yang Zeng, Yu-Ting Liu, Kai Chen, Xiao-Qing Gao, Jun Xiong   +10 more
doaj   +1 more source

Synthesis of Isoxazoline Derivatives through Boulton–Katritzky Rearrangement of 1,2,4-Oxadiazoles

, 2013
The base-induced rearrangement of 1,2,4-oxadiazoles into isoxazoline derivatives is reported. This represents the first example of a three-atom side-chain rearrangement that involves a saturated CCO side chain at C-3 of the oxadiazole.
PALUMBO PICCIONELLO, Antonio, GUARCELLO, Annalisa, BUSCEMI, Silvestre, PACE, Andrea   +3 more
core   +1 more source

Immobilization of Styrene-Substituted 1,3,4-Oxadiazoles Into Thermoreversible Luminescent Organogels and Their Unexpected Photo-catalyzed Rearrangement

, 2012
International audienceA series of styrene-substituted 1,3,4-oxadiazoles has been designed and investigated as new low-molecular-weight organogelators. The photophysical properties of the resulting thermoreversible organogels have been characterized by UV/
Bertin, Denis, Dumur, Frédéric, Gigmes, Didier, Wantz, Guillaume, Phan, Trang N.T., Contal, E.   +5 more
core   +1 more source

INOVAÇÃO E PROPRIEDADE INTELECTUAL DOS 1,2,4-OXADIAZÓIS: UMA PROSPECÇÃO TECNOLÓGICA FUNDAMENTADA EM BASE DE DADOS DE PATENTES E PERIÓDICOS

Química Nova
1,2,4-Oxadiazoles are heterocyclic compounds that have a remarkable range of applications. This overview focused on investigating the potential and scientific and technological evolution of these compounds through an analysis of patent databases and ...
Erick Caique Santos Costa, Jucleiton José Rufino de Freitas, Juliano Carlo Rufino Freitas   +2 more
doaj   +1 more source

Palladium (0) catalyzed synthesis of thiophene based 1,3,4-oxadiazoles their reactivities and potential nonlinear optical properties

, 2020
Novel thiophene based 1,3,4-oxadiazoles were synthesized via Suzuki cross-coupling of 2-(5-bromothiphen-2-yl)-5-phenyl-1,3,4-oxadiazole with various substituted aryl-boronic acids in significant yields (58-78%).
Gulraiz, Ahmad, Nasir, Rasool, Muhammad Ali, Hashmi, Abbas, Mujahad, Abbas, Komal, Rizwan, Umer, Rashid   +5 more
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